Linux下捕捉键盘事件

直接上代码：

#include <termio.h>
#include <stdio.h>

#include <unistd.h>

　#include <fcntl.h>

int scanKeyboard()
{
    int in;
    struct termios new_settings;
    struct termios stored_settings;
    tcgetattr(0,&stored_settings);
    new_settings = stored_settings;
    new_settings.c_lflag &= (~ICANON);
    new_settings.c_cc[VTIME] = 0;
    tcgetattr(0,&stored_settings);
    new_settings.c_cc[VMIN] = 1;
    tcsetattr(0,TCSANOW,&new_settings);
     
    in = getchar();
     
    tcsetattr(0,TCSANOW,&stored_settings);
    return in;
}

int KeyTest()
{
    return scanKeyboard();
}

// 这个函数是跨平台的
int KeyTestNew()
    {
#ifdef _WIN32
        HANDLE keyboard = GetStdHandle(STD_INPUT_HANDLE);
        DWORD dw, num;
        if (!::GetNumberOfConsoleInputEvents(keyboard, &num) || num == 0) {
            return 0;
        }
        for (int i = 0; i < (int)num; ++i) {
            INPUT_RECORD input;
            ::ReadConsoleInputA(keyboard, &input, 1, (LPDWORD)(&dw));
            if (input.EventType == KEY_EVENT && !input.Event.KeyEvent.bKeyDown) {
                //return (int)(input.Event.KeyEvent.uChar.AsciiChar);
                return (int)(input.Event.KeyEvent.wVirtualKeyCode);
            }
        }
        return 0;
#endif
#ifdef __linux__
        struct termios oldt, newt;
        int c, oldf;
        tcgetattr(STDIN_FILENO, &oldt);
        newt = oldt;
        newt.c_lflag &= ~(ICANON | ECHO);
        tcsetattr(STDIN_FILENO, TCSANOW, &newt);
        oldf = fcntl(STDIN_FILENO, F_GETFL, 0);
        fcntl(STDIN_FILENO, F_SETFL, oldf | O_NONBLOCK);
        c = getchar();
        tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
        fcntl(STDIN_FILENO, F_SETFL, oldf);
        if (EOF != c) {
            if (c >= 'a' && c <= 'z') {
                return (c - 'a' + 'A');
            } else {
                return c;
            }
        } else {
            return 0;
        }
#endif
    }

int main()
{
    while(1)
    {
        int nNum = KeyTest();
        printf("nNum:%d
",nNum);
    }
    return 0;
}